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Thread: FM demodulator using PLL

  1. #1 FM demodulator using PLL 
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    I am just unsure what values of capacitors and resistors to use with a 4046. The only other thing I know is the ratio detector. I had a gif of an FM detector using, I believe it was CMOS NAND gates with resistors and capacitors, tuned to 10.7 MHz.


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  3. #2 Re: FM demodulator using PLL 
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    Quote Originally Posted by quantumbrewer
    I am just unsure what values of capacitors and resistors to use with a 4046.
    To work this out we need a little more data, it is quite straightforward but many seem to drown in the maths when working out the loop filter values.

    What is the centre frequency? What is the deviation? What is the nature of the modulation?

    Steve A.


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  4. #3  
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    Years ago I built NBFM PLL detectors using open collector gates..TTL

    Most detectors are quadrature detectors these days and are usually contained within IC IF amplifiers..
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  5. #4  
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    Years ago I built NBFM PLL detectors using open collector gates..TTL

    Most detectors are quadrature detectors these days and are usually contained within IC IF amplifiers..
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